/**
 * struct field - Pre-computed field data
 * @offset:	Offset in packet header, bytes
 * @groups:	Number of 4-bit groups
 * @rules:	Number of inserted rules
 * @bsize:	Lookup table bucket size, bytes
 * @lt:		Lookup table
 * @mt:		Mapping table (n:m rules in next field)
 */
struct field {
	int offset;
	int groups;
	int rules;

	int bsize;
	uint8_t *lt;
	union map_bucket *mt;
};

/**
 * struct set - Array of sets
 * @fields:	Composing fields
 */
struct set {
	struct field *fields;
};

#define for_each_field(f, s, layout)					\
	for ((i) = 0, (f) = (s)->fields;				\
	     (layout)[(i)]->type != KEY;				\
	     i++, f++)

int init(struct set *s, struct desc_spec **layout);
int add(struct set *s, struct desc_spec **layout, uint8_t *data);
int list_or_del(struct set *s, struct desc_spec **layout, uint8_t *match);

#ifdef VERBOSE
void show_lookup(struct field *f);
void show_mapping(struct field *f, int to_key);
#else
#define show_lookup(...) do { } while (0)
#define show_mapping(...) do { } while (0)
#endif